00000nam 2200000za 4500 9.830370 CaOODSP 20230501141950 cr ||||||||||| 170112s2016 oncd ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-5/2016-112E-PDF Hammill, M. O. (Michael O.) Evaluating impacts of a flexible quota system on walrus harvesting [electronic resource] / M.O. Hammill, A. Mosnier, R. Young. Title at head of French abstract : Évaluation des impacts d’un système de quota flexible sur la récolte de morse Ottawa : Fisheries and Oceans Canada, c2016. iv, 17 p. : col. ill. Canadian Science Advisory Secretariat research document, 1919-5044 ; 2016/112, Quebec and Central and Arctic Regions Cover title. “December 2016.” Includes bibliographical references. "Various model scenarios were run to determine the sustainability of a system allowing flexible catch limits of walruses involving carry-overs or credits between years over a five-year period. Two modeling approaches were examined. In the first, population numbers are projected over a period of 100 years with harvest rates based on PBR updated from estimates of the population every ten years. Results of model runs indicate that modelling scenarios with harvest debits or credits from year to year were not significantly different from the base model with no credit or debit between years. These results indicate that a flexible harvest limit system can be sustainable, as long as the five year total remains less than or equal to the total quota for the five years (i.e. five times the PBR), as was the case in our model runs"--Abstract, p. iv. Includes abstract in French. gccst Fisheries resources gccst Seals gccst Animal populations gccst Modelling Mosnier, Arnaud. Young, Robert James. Canada. Department of Fisheries and Oceans. Canada. Ecosystems and Oceans Science. Canadian Science Advisory Secretariat. Freshwater Institute (Canada) Maurice Lamontagne Institute. Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2016/112, Quebec and Central and Arctic Regions (CaOODSP)9.507396 PDF 776 KB https://publications.gc.ca/collections/collection_2017/mpo-dfo/Fs70-5-2016-112-eng.pdf